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Abstract
This study investigates the effect of the Nucleus CI24RE implant's neural response telemetry (NRT) system, which has less internal noise compared to its predecessor, the CI24M/R implant, on the NRT threshold (TNRT) profile across the array. CI24M/R measurements were simulated by ignoring CI24RE measurements with response amplitudes below 50 uV. Comparisons of the estimated TNRTs from the CI24RE measurements and the CI24M/R simulations suggest that, apart from a constant level difference, the TNRT profiles from the newer implant generally would not have differed very much from those of its predecessor. This view was also reflected by principal component analysis (PCA) results which revealed a ‘shift’ component similar to that reported by Smoorenburg et al (2002). On the whole, there is no indication that current practices of using the TNRT profiles for assisting with speech processor programming need to be revised for the CI24RE implant.
| Abbreviations | ||
| AGF | = | Amplitude growth function |
| ECAP | = | Evoked compound action potential |
| DSP | = | Digital signal processor |
| NPE | = | Nucleus programming environment |
| NRT | = | Neural response telemetry |
| PCA | = | Principal component analysis |
| RP8 | = | Research platform 8 |
| TNRT | = | Neural response telemetry threshold |
| Abbreviations | ||
| AGF | = | Amplitude growth function |
| ECAP | = | Evoked compound action potential |
| DSP | = | Digital signal processor |
| NPE | = | Nucleus programming environment |
| NRT | = | Neural response telemetry |
| PCA | = | Principal component analysis |
| RP8 | = | Research platform 8 |
| TNRT | = | Neural response telemetry threshold |
Sumario
Este estudio investiga el efecto del sistema de telemetría de la respuesta neural (NRT) del implante Nucleus C124RE, que produce menos ruido interno que su predecesor, el implante C124M/R, en cuanto al perfil de umbrales NRT (TNRT) en todos los electrodos. Se simularon mediciones en el C124M/R ignorando las mediciones del C124RE con amplitudes de respuesta por debajo de 50 µ V. Comparaciones de los TNRT estimados de las mediciones del C124RE y de las simulaciones del C124M/R sugieren que, aparte de una diferencia constante de nivel, los perfiles de los TNRT del implante más nuevo no difieren mucho de los de su predecesor. Esta observación también fue reflejada por los resultados del análisis de componente principal (PCA) que revelaron un componente de “cambio” similar al reportado por Smoorenburg y col (2202). En general, no hay indicacióen de que las prácticas actuales de usar los perfiles TNRT para la programacióen del procesador del lenguaje necesiten revisióen para el implante C124RE.